超临界流体处理活性炭时Ni/C催化剂催化加氢性能研究  

Effect of supercritical fluid treatment on the catalytic hydrogenation of Ni/C catalysts

作　　者：刘扬[1] 马建军 陈江波[1] 董鹏[1] 徐彦铎[1] 

机构地区：[1]兰州理工大学石油化工学院,甘肃兰州730050 [2]甘肃银光聚银有限公司,甘肃白银730090

出　　处：《应用化工》2013年第6期977-979,共3页Applied Chemical Industry

基　　金：国家自然科学基金资助项目(20961004)

摘　　要：分别以高温煅烧、超临界水、超临界甲醇、超临界H2O2溶液及超临界KOH溶液处理活性炭,采用浸渍-沉淀法制备镍基催化剂。考察了不同处理方法处理载体所制催化剂催化对硝基苯酚液相加氢的影响。结果表明,通过不同的超临界流体处理能有效地降低活性炭表面酸性基团含量,能不同程度提高活性炭的比表面积和孔容积,提高镍在其表面的分散程度,提高催化剂的活性。在相同的反应条件下,超临界KOH溶液处理的活性炭作载体所制得的催化剂催化效果最佳。The activated carbon was processed with calcining, supercritical water, supercritical ethanol, su- percritical peroxide solution and supercritical potassium hydroxide solution, Ni catalysts were prepared by impregnation-precipitation method. The catalytic activity of different nickel catalysts in liquid-phase hy- drogenation of p-nitrophenol was researched. The results show that supercritical fluid treatment could re- markably change the surface structure of the activated carbon, thus resulting in considerable decrease of the surface acidic groups, which led to higher dispersion of Ni and enhanced the activity of catalysts. The catalysts treated with supercritical potassium hydroxide solution is better than others under the same con- ditions.

关 键 词：液相催化 超临界流体 镍基催化剂 对硝基苯酚 加氢 

分 类 号：TQ246.3[化学工程—有机化工] O643.3[理学—物理化学]